题目

阅读理解Birthdaysoften involve surprises. But this year's surprise on the birthday of the greatBritish playwright William Shakespeare is surely one of the most dramatic.OnApril 22, one day before his 441st birthday anniversary, experts discoveredthat one of the most recognizable portraits of William Shakespeare is a fake.This means that we no longer have a good idea of what Shakespeare looked like.It's very possible that many pictures of Shakespeare might be unreliablebecause many of them are copies of this one, said an expert fromBritain's National Portrait Gallery.Thediscovery comes afte要想获得无病毒植株，可选择以下植物什么部位进行离体培养A．根尖和芽尖 B．花粉粒 C．韧皮部细胞 D．叶肉细胞